CHEMISTRY HIGH SCHOOL

during a canoe race, a camper paddles a distance of 406 meters in 70 seconds. what's the average speed of the race?

Answers

Answer 1
Answer:

Answer:

Average speed of the racer is 5.8 m/s.

Explanation:

Total distance covered by racer = D = 406 m

Total time taken racer= T = 70 seconds

The formula of an average speed is given by:

Average speed :

=\frac{\text{Total distance covered}}{\text{Total time taken}}=(D)/(T)

Average speed of the racer is:

=(406 m)/(70 seconds)=5.8 m/s
Answer 2
Answer: speed= distance/time
5.8 m/s=406/70

1km = 100m 
1h= 3600s
(5.8m/s)(1km/100m)(3600s/1h)

Related Questions

Which expression represents a reaction rate?a. time/massc. energy/timeb. number/timed. time/energy
Which compound is soluble in water?(1) PbS (3) Na2S(2) BaS (4) Fe2S3
The element mercury was first discovered on the Sun.a. Trueb. False
Alchemy is a branch of ancient knowledge that states lead metal is a form of gold metal. Which of these best explains whether alchemy is a science or pseudoscience? It is a science because ancient knowledge is often reliable. It is a science because metallurgy is known to be a branch of science. It is pseudoscience because ancient knowledge is mystical yet reliable. It is pseudoscience because each metal is known to be a unique element.
Which of the following elements may occur in the greatest number of different oxidation states?(A) C (B) F (C) O (D) Ca (E) Na

An indicator is what type of compound?a. reducing agent
b. oxidizing agent
c. weak base or acid
d. strong base or acid

Answers

The letter (d.) strong base or acid would be the most appropriate answer to the question above. An indicator is a strong base or acid. Indicators are strong base and acid because through this you can determine if a compound is acid or base with its color.

Indicators  are compounds which are weak bases or weak acids as they can dissociate into ions .The correct option is C.

Indicator is defined as a chemical substance which is chemically a weak acid or a weak base which changes it's color depending upon the concentration of hydrogen ions present in the solution.They dissociate slightly in water to produce ions.

These are generally derived from plant pigments and are of slightly acidic or basic in nature.There are three types of indicators:

1) natural indicators

2) synthetic indicators

3) olfactory indicators.

These are mainly used in determination of end point of titrations. Every indicator has it's pH range in which it can perform effectively.These are usually organic compounds.

As weak acids and bases are easily dissociated ,thus indicators are weak bases or weak acids.Thus, the correct option is C.

Learn more about indicators,here:

brainly.com/question/29016702

#SPJ6

Atoms of which element can bond with each other to form ring and chain structures in compounds?(1) C (3) H
(2) Ca (4) Na

Answers

The correct answer is option 1. It is the carbon (C) atom that can bond with each other to form ring and chain structures in compounds. These ring and chain structures and compounds are called organic compounds. Chain structures include alkanes, alkenes, alkynes. Ring structures include cyclic hydrocarbons and aromatic hydrocarbons.

Which quantity identifies an element?1. Atomic number
2. Mass Number
3. total number of neutrons in an atom of the element
4. total number of valence electrons in an atom of the element

Answers

Answer is (1) - atomic number.

Atomic number is unique for an element. The elements in periodic table are organized according to the atomic number of elements. Another thing is atomic number is equal to number of protons of the element.

Mass number can be defined as the sum of proton number and neutron number. Although proton number is same for the atoms of same element, the neutron number can be varied.The atoms which has same atomic number but have different number of neutrons are called isotopes. Hence, mass number not enough for the identification of elements.

Only the neutron number is also not enough for the identification of elements. But if you have both mass number and the neutron number, then you can find atomic number by using mass number = proton number + neutron number equation. Then you can identify the element.

If you have total number of electrons of the element when it is in its neutral state you can identify the element because at neutral state number of electrons = number of protons (atomic number). But if only the valence electrons are given then you cannot find the element exactly because usually all elements in certain group have same number of valence electrons.
Atomic number identifies an element. Atomic number is the  number of protons in the atom of an element, which is different for every element.

Water can dissolve other substances. Which factor best contributes to this property of water?A. Water is made up of ionic bonds.
B. Water has weak intermolecular forces.
C. Water is denser than most substances.
D. Water particles are not fixed in place.

Answers

Water is known to be theuniversal solvent because it can mostly dissolve most of the substances. Thereason behind its solvability is the bonding of intermolecular forces of attraction.The answer is letter B. Out of the many bondings between molecules, the bondthat governs water is H bonding or hydrogen bonding. Water is composed mostlyof two atoms of hydrogen one atom of oxygen. Both the hydrogen and oxygen arepolar elements and hydrogen is bounded with a high electronegativity oxygen atom.

The correct answer for e2020 is D

The solution set of axequalsb is the set of all vectors of the form wequalspplusbold v subscript h​, where bold v subscript h is any solution of the equation axequals0.

Answers

Answer : Incorrect

Explanation : In the given solution set of Ax = b;
is set of all vectors to form w= p + V_(h)
here V_(h) is is any solution of the equation Ax = 0;

this stands to be incorrect, as the correct would only exists when some vector p is found to be like this Ap=b

A gas cylinder contains 2.0 mol of gas X and 6.0 mol of gas Y at a total pressure of 2.1 atm. What is the partial pressure of gas Y?

Answers

The answer is 1.6 atm. Let's first calculate the mole fraction of gas Y. The mole fraction (x) is: x = n1/n, where n1 is a number of moles of an individual gas in a mixture and n is total moles of the gas mixture. We know that n1 of gas Y is 6.0 mol (n1 = 6.0 mol) and that there are in total 8. mol of the gas mixture (n = 2.0 + 6.0 = 8.0 mol). Now calculate the mole fraction of gas Y. x = 6.0/8.0 = 0.75. Now, let's use the mole fraction of gas Y (x) and the total pressure (P) to calculate the partial pressure of gas Y (P1): x = P1/P. P1 = x * P. If x = 0.75 and P = 2.1 atm, then the partial pressure of gas Y is: P1 = 0.75 * 2.1 atm = 1.6 atm.

yes, this would be 1.6 atm
Other Questions
The tempertaure at which the pressure of the vapor of a liquid is equal to the external pressure acting on the surface of the liquid?
When you have ACT Chemistry exam What book, file, or where can I get something that I need to study to prepare for the exam? ​
Predict whether a reaction will occur when HClO and Sr(OH)2 solutions are mixed, if yes determine spectator ions in the ionic equation.
Which list of solutions is arranged in order from highest boiling point to lowest boiling point?